Disintegration assistant for casting molds
US4600733A · kind A · utility
51Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1985 |
| Grant date | Jul 15, 1986 |
| Priority date | — |
| Expiry date | Feb 28, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C1/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A disintegration assistant is added to a molding composition made up of foundry sand and a binder whose major part is a condensation-reactive compound or resin having methylol groups in a molecule. The molding composition is formed into a mold and a core by solidifying the resin so that individual grains of the foundry sand are bound each other. The disintegration assistant is mainly made of calcium hydroxide, calcium carbonate, barium hydroxide and/or barium carbonate, thereby promoting the heat deterioration of the resin to improve the disintegration characteristics of the mold and the core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.